Create and upload a new project on GitHub command line, Raspbian

In order to work with command line interface I have to create SSH key and upload this key to the GitHub.

Generate Key:

ssh-keygen -t rsa -b 4096 -C "name.surname@gmail.com"

Ensure SSH agent is up and running:

eval `ssh-agent -s`

Add SSH key to ssh-agent:

ssh-add ~/.ssh/id_rsa

Install command line clipboard manager so the content which should be copied to the clipboard can not be copied incorectly:

sudo apt-get install xclip

Copy the content to clipboard:

xclip -sel clip < ~/.ssh/id_rsa.pub

Go to https://github.com/settings/keys and press [New SSH key], write the name and paste the content:

Now lets get down to the business.

Make sure the git is installed on Raspbian operating system:

sudo apt-get update -y && sudo apt-get upgrade -y && sudo apt-get install git -y

Let's create new repository in live environment with project name "rpi-stretch":

curl -u 'catonrug' https://api.github.com/user/repos -d '{"name":"rpi-stretch","description":"auto configuration"}'

Let's create local the directory which will go on the internet:

mkdir ~/rpi-stretch

Let's go inside this project directory:

cd ~/rpi-stretch

Tell the computer that is supposed to be a git repository:

git init

Tell the computer where this repository equals online:

git remote add origin git@github.com:catonrug/rpi-stretch.git

Add all files in project:

git add .

Create a commit. Calculate if there is any difference:

git commit -m "first"

after this command I can get:

*** Please tell me who you are.

Run

  git config --global user.email "you@example.com"
  git config --global user.name "Your Name"

to set your account's default identity.
Omit --global to set the identity only in this repository.

fatal: empty ident name (for <(null)>) not allowed

As it can see I need to enter github credentials here:

git config --global user.email "name.surname@gmail.com"
git config --global user.name "catonrug"

Make changes online:

git push origin master

All done. If I miss the first step off SSH key upload then in this situation I will receive:

Permission denied (publickey).
fatal: Could not read from remote repository.

Please make sure you have the correct access rights
and the repository exists.

To debug this situation I can use:

ssh -vT git@github.com

After all, at first, I have to create SSH key and upload to GitHub.
Can in it done with GitHub API? You tell me ;)